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Definition of infantile:

  1. Of or pertaining to infancy, or to an infant; similar to, or characteristic of, an infant; childish; as, infantile behavior.


asymptomatic, full-grown, young, childlike, babyish, jejune, autoimmune, full-blown, fully-fledged, benign, developed, grown, clinical, catching, cherubic, childish, chronic, communicable, puerile, fully-grown, kiddish, advanced, naive, congenital, full-fledged, infantine, infant, baby, youth, growth, acute, childlike, immature.

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